Range C. Montana, w. North Dakota, and Iowa south through e. Wyoming and Colorado to ne. New Mexico, e. half of Texas to the coast, and extreme n. Arkansas; Gulf coast of se. Texas and w. Louisiana.

Discussion This subspecies is smaller than many of the other racers. Racers eat large insects, frogs, lizards, snakes, small rodents, and birds, but they are not constrictors, despite the scientific name.